#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <math.h>
int main()
{
	double a = 3.62;
	double b = 4.32;
	double c = 5.32;
	double s = 0;
	double area;
	
	s = (a + b + c) / 2;
	area = sqrt(s * (s - a) * (s - b) * (s - c));
	printf("area= %f\n",area);
	return 0;
}